I unlocked a GeForce 6800 LE, but pixel and vertex artifacts appeared in 3DMark2005. I disabled the pipelines one by one and discovered that one factory-disabled pixel pipeline and one factory-enabled vertex pipeline were defective. Using a RivaTuner script, I can modify the BIOS to enable or disable a locked pipeline, but I cannot lock a pipeline that was enabled by default. While this can be done within Windows, I specifically want to do it in the BIOS so I don't have to remember later which pipeline is defective.